Sundial Bridge

This pedestrian bridge features a single 217 foot mast that serves as the gnomon of the world's largest sundial. Sundial Bridge shadow is cast upon a large dial to the north of the bridge, though the shadow cast by the bridge is exactly accurate on only one day in a year - the summer solstice, June 21. The tip of the shadow moves at approximately one foot per minute so that the Earth's rotation about its axis can be seen with the naked eye.